The update is free and can be downloaded via the Kindle's built-in wireless connection.

Additionally, Electronista adds that "users can now manually rotate their screens as they see fit in the smaller Kindles, with they five-way controller switching up its functions to suit."

The update is live for the Kindle 2 and Kindle DX, although the DX already had native PDF support. For the DX, however, PDFs will be more efficiently cropped and the screen save will go on after 20 minutes of viewing time instead of the previous five.

The original Kindle will get native PDF support "soon" with no set timetable.